530171221 has 2 divisors, whose sum is σ = 530171222. Its totient is φ = 530171220.

The previous prime is 530171219. The next prime is 530171267. The reversal of 530171221 is 122171035.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 288524196 + 241647025 = 16986^2 + 15545^2 .

It is a cyclic number.

It is not a de Polignac number, because 530171221 - 2¹ = 530171219 is a prime.

Together with 530171219, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 530171192 and 530171201.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (530171281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 265085610 + 265085611.

It is an arithmetic number, because the mean of its divisors is an integer number (265085611).

Almost surely, 2^530171221 is an apocalyptic number.

It is an amenable number.

530171221 is a deficient number, since it is larger than the sum of its proper divisors (1).

530171221 is an equidigital number, since it uses as much as digits as its factorization.

530171221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 420, while the sum is 22.

The square root of 530171221 is about 23025.4472486421. The cubic root of 530171221 is about 809.3543709575.

The spelling of 530171221 in words is "five hundred thirty million, one hundred seventy-one thousand, two hundred twenty-one".